2001221054 has 24 divisors (see below), whose sum is σ = 3493844640. Its totient is φ = 857195136.

The previous prime is 2001221039. The next prime is 2001221063. The reversal of 2001221054 is 4501221002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219662 + ... + 228590.

It is an arithmetic number, because the mean of its divisors is an integer number (145576860).

Almost surely, 2^2001221054 is an apocalyptic number.

2001221054 is a deficient number, since it is larger than the sum of its proper divisors (1492623586).

2001221054 is a wasteful number, since it uses less digits than its factorization.

2001221054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11232 (or 11225 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2001221054 is about 44735.0092656747. The cubic root of 2001221054 is about 1260.1774030047.

Adding to 2001221054 its reverse (4501221002), we get a palindrome (6502442056).

The spelling of 2001221054 in words is "two billion, one million, two hundred twenty-one thousand, fifty-four".